PEO基有机/无机复合固态电解质的研究进展
收稿日期: 2024-05-07
网络出版日期: 2024-06-13
Research progress of PEO based organic/inorganic composite solid electrolyte
Received date: 2024-05-07
Online published: 2024-06-13
锂离子电池由于其高能量密度、长循环寿命等优点被认为是方便、有效的储能设备。为了提高锂离子电池的高稳定性和高安全性，固态电解质已经被广泛研究；但单一聚合物固态电解质存在如离子电导率低、工作电压窗口窄等问题，无法满足全固态锂离子电池的性能标准。PEO基复合电解质因其易加工、成本低，界面接触良好的优势，是目前最有前景的一类电解质体系。基于此，首先对复合固态电解质进行了基本介绍，并探讨PEO基的离子传导机理，然后根据无机填料的不同几何结构，如纳米粒子、纳米线/纳米管、二维片状材料、三维骨架结构，综述了近几年来的相关研究成果，详细阐述了不同几何结构的无机填料对电解质性能尤其是离子电导率、全电池的循环性能等影响，最后对复合固态电解质面临的关键问题和发展进行了展望。
马静媛 , 李妍 , 周晗洁 , 李建刚 . PEO基有机/无机复合固态电解质的研究进展[J]. 无机盐工业, 2025 , 57(3) : 1 -8 . DOI: 10.19964/j.issn.1006-4990.2024-0249
Lithium-ion battery is considered as the most convenient and effective energy storage equipment due to its high energy density and long cycle life.In order to improve the stability and safety of lithium-ion batteries，solid-state electrolytes have been widely studied.However，pure polymer electrolytes have the drawbacks of lower ionic conductivity，narrow operating voltage window，which hindered their applications in all-solid-state lithium-ion batteries.PEO-based composite electrolytes are the most promising class of electrolyte systems due to their advantages of easy processing，low cost，and good interfacial contact.Based on this，composite solid electrolytes were introduced basicly and the ionic conduction mechanism of PEO-based electrolytes was discussed，and then the relevant research results in recent years according to the different geometries of inorganic fillers，such as nanoparticles，nanowires/nanotubes，two-dimensional lamellar materials，and 3D skeleton structures were reviewed.The effects of inorganic fillers with different geometries on the performance of electrolytes，especially ionic conductivity，and the cycling performance of the full battery were elaborated.Finally，the key issues and development of composite solid-state electrolytes were summarized.
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